Labour MP Jess Phillips has been targeted by protesters in Birmingham, who are against the teaching of LGBT relationships in primary schools.
Posters calling for a "vote of no confidence" in the politician have appeared in Birmingham, after she spoke out in support of the lessons taking place.
The protesters have been carrying out weeks of demonstrations outside Anderton Park Primary School, which is among a number of schools teaching about same-sex relationships.
But the Birmingham Yardley MP said the posters had not been put up in the constituency she represents.
Sharing a photo of one of the posters online, Ms Phillips said: "Anti relationship education protestors [sic] have been putting these posters up in Birmingham.
"I mean they failed to do it in the area I actually represent, but I want you to know that if standing up for what I believe and safeguarding children costs me votes I'll sleep well in my bed."
At the end of May, Ms Phillips confronted the protesters outside Anderton Park Primary School after they took their children out of lessons over the teaching of LGBT relationships.
At the time, the MP told the protesters at the Birmingham school - situated in the constituency of Hall Green - that she did not agree with the protest.
“I don’t agree that you can pick and choose which equality you can and can’t have,” she said.
“I’m afraid our equality laws protect us all.”
The parents have been protesting for over two months
The school is an area represented by fellow Labour MP Roger Godsiff.
Mr Godsiff had previously given his support to the protesters suggesting that the pupils were “too young” to learn about LGBT relationships.
On June 14, the MP for Hall Green was given a warning by Labour's chief whip, Nick Brown, not to repeat his support for the protesters.